import React, { useRef, useState } from "react";
import Chart from "chart.js";

import Card, { CardHeader } from "./Card";
import { createPopper } from "@popperjs/core";

export function ChartTooltip({ tooltipData, ...props }) {
  return (
    <>
      <p className="font-bold">{tooltipData.title}</p>
      { tooltipData.body.map((item, index) => (
        <div key={item.lines} className="flex items-center justify-center">
          <span className="w-3 h-3 rounded-full" style={{ backgroundColor: tooltipData.labelColors[index].borderColor }} />
          <p className="px-2 text-sm">{item.before + item.lines + item.after}</p>
        </div>
      ))
      }
    </>
  )
}

const setOpacity = (hex, alpha) => `${hex}${Math.floor(alpha * 255).toString(16).padStart(2, 0)}`;

function generateGetBoundingClientRect(x = 0, y = 0) { return () => ({ width: 0, height: 0, top: y, right: x, bottom: y, left: x }); }

function GetPlacement(tooltipModel) {
  switch (tooltipModel.xAlign) {
    case "right":
      return "left";
    case "left":
      return "right";
  }
  switch (tooltipModel.yAlign) {
    case "top":
      return "bottom";
    case "bottom":
      return "top";
  }
}

export default function NejChart(props) {
  let [tooltipData, setTooltipData] = useState(null)
  let canvasRef = useRef(null);
  let popperElement = useRef(null);

  let tooltipPositionEl = {
    getBoundingClientRect: generateGetBoundingClientRect(100, 100),
    contextElement: canvasRef.current
  };

  React.useEffect(() => {
    var ctx = canvasRef.current.getContext("2d");

    let popper = createPopper(tooltipPositionEl, popperElement.current, { placement: "bottom" });

    let accentCol = getComputedStyle(document.body).getPropertyValue("--accent-dark");
    let accent2Col = getComputedStyle(document.body).getPropertyValue("--accent2");
    let accent3Col = getComputedStyle(document.body).getPropertyValue("--accent3");
    let accent4Col = getComputedStyle(document.body).getPropertyValue("--accent4");
    let accent5Col = getComputedStyle(document.body).getPropertyValue("--accent5");
    let accent6Col = "rgb(180,0,0)"//getComputedStyle(document.body).getPropertyValue("--accent6");

    let bgTrianry = getComputedStyle(document.body).getPropertyValue("--trinary");
    let primary = getComputedStyle(document.body).getPropertyValue("--primary-text");
    let secondary = getComputedStyle(document.body).getPropertyValue("--secondary-text");

    console.log(Chart.defaults);
    Chart.defaults.global = {
      ...Chart.defaults.global,
      maintainAspectRatio: false,
      responsive: true,
      defaultColor: [accentCol, accent2Col, accent3Col, accent4Col, accent5Col, accent6Col],
      legend: {
        ...Chart.defaults.global.legend,
        labels: {
          ...Chart.defaults.global.legend.labels,
          fontColor: secondary,
          usePointStyle: true
        },
      },
      tooltips: {
        ...Chart.defaults.global.tooltips,
        backgroundColor: bgTrianry,
        enabled: false,
        custom: (tooltipModel) => {
          // if chart is not defined, return early
          if (!canvasRef.current) {
            return;
          }
          // hide the tooltip when chartjs determines you've hovered out
          if (tooltipModel.opacity === 0) {
            setTooltipData(null);
            return;
          }

          let position = canvasRef.current.getBoundingClientRect();
          let left = position.left + tooltipModel.caretX;
          let top = position.top + tooltipModel.caretY;

          tooltipPositionEl.getBoundingClientRect = generateGetBoundingClientRect(left, top);
          popper.setOptions({ placement: GetPlacement(tooltipModel) });

          setTooltipData(tooltipModel);
        },
      },
    }
    Chart.defaults.scale = {
      ...Chart.defaults.scale,
      ticks: {
        ...Chart.defaults.scale.ticks,
        fontColor: secondary,
      },
      gridLines: {
        ...Chart.defaults.scale.gridLines,
        drawBorder: false,
        color: setOpacity(primary, 0.1),
        zeroLineColor: "rgba(0, 0, 0, 0)",
        /*
        zeroLineBorderDash: [2],
        zeroLineBorderDashOffset: [2],
        */
      },
    }

    console.log(Chart.defaults);
    console.log(props.config);
    let chart = new Chart(ctx, props.config);
    return ()=>{
      chart.destroy();
    }
  }, []);
  return (
    <>
      <canvas ref={canvasRef} />
      <div ref={popperElement} className={(tooltipData ? "block " : "hidden ") + " pointer-events-none text-primary bg-trinary rounded-xl px-2 py-1"}>
        {tooltipData ? <ChartTooltip tooltipData={tooltipData} /> : null}
      </div>
    </>
  );
}

export function ExLineChart() {

  let accentCol = getComputedStyle(document.body).getPropertyValue("--accent");
  let bgTrianry = getComputedStyle(document.body).getPropertyValue("--trinary");
  let primary = getComputedStyle(document.body).getPropertyValue("--primary-text");
  let secondary = getComputedStyle(document.body).getPropertyValue("--secondary-text");

  var config = {
    type: "line",
    data: {
      labels: [
        "January",
        "February",
        "March",
        "April",
        "May",
        "June",
        "July",
      ],
      datasets: [
        {
          label: new Date().getFullYear(),
          backgroundColor: accentCol,
          borderColor: accentCol,
          data: [65, 78, 66, 44, 56, 67, 75],
          fill: true,
          hoverBackgroundColor: accentCol,
          hoverBorderColor: accentCol,
          backgroundColor: setOpacity(accentCol, 0.1),
        },
        {
          label: new Date().getFullYear() - 1,
          backgroundColor: primary,
          borderColor: primary,
          data: [40, 68, 86, 74, 56, 60, 87],
          fill: true,
          hoverBackgroundColor: primary,
          hoverBorderColor: primary,
          backgroundColor: setOpacity(primary, 0.1),
        },
      ],
    },
    options: {
      legend: {
        display: false,
      },
      tooltips: {
        mode: "index",
        intersect: false,
      },
      scales: {
        xAxes: [
          {
            display: true,
            scaleLabel: {
              display: false,
            },
            gridLines: {
              display: false,
            },
          },
        ],
        yAxes: [
          {
            ticks: {
              stepSize: 25
            },
            display: true,
            scaleLabel: {
              display: false,
            },
            gridLines: {
              zeroLineBorderDash: [2],
              zeroLineBorderDashOffset: [2],
            },
          },
        ],
      },
    }
  };
  return (
    <Card>
      <CardHeader desc="Sales"></CardHeader>
      <div className="p-4 flex-auto">
          <NejChart config={config} />
      </div>
    </Card >
  )
}


export function ExBarChart() {

  let accentCol = getComputedStyle(document.body).getPropertyValue("--accent");
  let bgTrianry = getComputedStyle(document.body).getPropertyValue("--trinary");
  let primary = getComputedStyle(document.body).getPropertyValue("--primary-text");
  let secondary = getComputedStyle(document.body).getPropertyValue("--secondary-text");

  var config = {
    type: "bar",
    data: {
      labels: [
        "January",
        "February",
        "March",
        "April",
        "May",
        "June",
        "July",
      ],
      datasets: [
        {
          label: new Date().getFullYear(),
          backgroundColor: accentCol,
          borderColor: accentCol,
          data: [65, 78, 66, 44, 56, 67, 75],
          fill: false,
          hoverBackgroundColor: accentCol,
          hoverBorderColor: accentCol,
        },
        {
          label: new Date().getFullYear() - 1,
          backgroundColor: primary,
          borderColor: primary,
          data: [40, 68, 86, 74, 56, 60, 87],
          fill: false,
          hoverBackgroundColor: primary,
          hoverBorderColor: primary,
        },
      ],
    },
    options:{
      legend: {
        display: false,
      },
      scales: {
        xAxes: [
          {
            display: true,
            scaleLabel: {
              display: false,
            },
            gridLines: {
              display: false,
            },
          },
        ],
        yAxes: [
          {
            ticks: {
              stepSize: 25
            },
            display: true,
            scaleLabel: {
              display: false,
            },
            gridLines: {
              zeroLineBorderDash: [2],
              zeroLineBorderDashOffset: [2],
            },
          },
        ],
      },
    }
  };
  return (
    <Card>
      <CardHeader desc="Sales"></CardHeader>
      <div className="p-4 flex-auto">
        {/* Chart */}
        <div className="relative h-350-px">
          <NejChart config={config} />
        </div>
      </div>
    </Card >
  )
}


export function ExPieChart() {

  let accentCol = getComputedStyle(document.body).getPropertyValue("--accent-dark");
  let accent2Col = getComputedStyle(document.body).getPropertyValue("--accent2");
  let accent3Col = getComputedStyle(document.body).getPropertyValue("--accent3");
  let accent4Col = getComputedStyle(document.body).getPropertyValue("--accent4");
  let accent5Col = getComputedStyle(document.body).getPropertyValue("--accent5");
  let accent6Col = "rgb(180,0,0)"//getComputedStyle(document.body).getPropertyValue("--accent6");

  var config = {
    type: "pie",
    data: {
      labels: [
        "Nejcraft",
        "Honzapat",
        "Kubacip",
        "Viktorf1",
        "Regi",
        "Euler",
      ],
      datasets: [
        {
          label: new Date().getFullYear(),
          data: [50, 10, 10, 10, 10, 10],
          fill: true,
          borderColor: [accentCol, accent2Col, accent3Col, accent4Col, accent5Col, accent6Col],
          hoverBorderColor: [accentCol, accent2Col, accent3Col, accent4Col, accent5Col, accent6Col],
          hoverBackgroundColor: [accentCol, accent2Col, accent3Col, accent4Col, accent5Col, accent6Col],
          backgroundColor: [accentCol, accent2Col, accent3Col, accent4Col, accent5Col, accent6Col],
        },
      ],
    },
    options: {
      legend: {
        labels: {
          usePointStyle: true
        },
        onClick: null,
        align: "end",
        position: "bottom",
      },
    }
  }
  return (
    <Card>
      <CardHeader desc="Sales"></CardHeader>
      <div className="p-4 flex-auto">
        {/* Chart */}
        <div className="relative h-350-px">
          <NejChart config={config} />
        </div>
      </div>
    </Card >
  )
}